Nut-lock.



No. 833,409. .PATENTED OCT. 16, 1906- W. J. MGGUIRE.

NUT LOCK.

APPLICATION FILED JULY 3, 1906.

2111162165563. fnvcvzivi? 66/ I I a 36% PATENT OFFICE.

WILLIAM J. MCGUIRE, OF. TOLEDO,

Oslo, .ASSIGNOR or {ONE-HALF To JAMES E. PILLIOD, or TOLEDO, orno.

NUT-LOCK.-

Specification of Letters Patent.

Patented Oct. 16, 1906.

i umitn the July 3,1905. Serial No. 324,550.

' y of Toledo, county of Lucas, and State of Ohio, have invented certain new'and useful Improvements Nut-Locks and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawlngs, and to the figures of reference marked thereon, which form part of this specification. Tlns invention has reference to an an provement in nut-locks and it has for its obect to provide simple, inexpensive, and sf fective means for preventing the removal of a nut from its bolt, except when such removal may be desired.

The invention is especially useful upon. mechanisms and devices where-there is excessive vibration and from which it may be desirable to remove a nut conveniently when the occasion demands.

in carrying out my invention I employ the novel combination, arrangement, and details of construction hereinafter shown, described, and specifically pointed out in the appended claims.

In the accompanying drawings, illustrative of my invention, Figure 1 is an elevation of a nut equipped with my improved locking means, the same being in position upon the screw-threaded shank of a bolt. 7 Fig. 2.is a face view of the same. Fig. 3 is a face view of the nut as it appears after being struck to provide the recess and slot therein. Fig. {l is a perspective view of. the complete nut with the 'l'ocking'parts in position. Fig. 5 is a detached view of the recessed locking dog.

Referring to the details, 1 indicates the nut adapted to be screwed upon the shank of a bolt 2. Provided in the face of the nut by striking with a suitable die is a recess 3, having the cylindrical side wall 4, and 5,is a perforation in the floor of the recess concentric to the Wall 4. 6 is a narrow slot also extending into the face of the nut and preferably formed simultaneously with the recess 3,

free end is ground to an edge to spring against and engage the threads of the bolt when the nut is in position to be-locked.

Rotatable within the recess 3 is a cylindrical locking-dog 10, having a reduced extensionll, pivoted in the perforation 5, and the dog is also provided with a cam,-face or depression 12, into which the pawl springs to permit the free end thereof to engage the threads of the bolt. The portions 13 and 14 of the dog provide shoulders on opposite sides of the springepawl when the parts are assembled, so that the pawl after being secured in the slot 6 will hold the dog in'positionand prevent its accidental disengagemerit from the nut through vibration or other causes. The outer face of the dog is preferably slotted, as at 15, to permit of its being operated by means of an ordinary screwdriver, a partial rotation of the dog forcing the free end of the pawl into or out of engagement with the threads of the bolt, as may be desired, to lock or unlock the nut. The locking-dog when in position within the recess 3 When assembled, the locking parts are-incapable of becoming dislodged underordinary usage and the nut will be efiectively locked'upon the bolt, its removal when desired being readily accomplished.

Having described my invention, what I claim, and desire to secure by Letters Patent, 18-- 1. A nut provided with a recessin its face having a cylindrical side bearing-wall, said not also provided with a slot disposed at a tangent to the bolt-hole therethrough, a spring-pawl secured at one end within the slot, and a cylindrical locking-dog rotatable in the recess in the nut and bearing against thecylindrical wall of said recess, said dog having a cam-face to engage the pawl and having shoulders disposed on opposite sides of the pawl, substantially as described.

2.: A nut provided with a recess in its face having a cylindrical side wall and a perfora tion in the floor of the recess concentric to the cylindrical wall thereof, said nut, also provided with a slot disposed at a tangent to the bolt-hole therethrough, a spring-pawl secured at one end in the slot. and a rotatable locking-dog disposed in the recess in the face In testimony that I claim the foregoing as of the nut and bearing a ajnst .the cylin-- my own I aflix my signature in presence of [0 drical Wall thereof, said dog haying a reduced two Witnesses.

extension pivoted in the perforation in the 5 floor of the recess and provided With a cam- WILLIAM MCGUIRE face to engage the pawl, and shoulders onthe Witnesses: dog disposed at the sides of the pawl, sub- CARL H. KELLER,

stantially as described. ARTHUR J. DART N. 

